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Astronomy Notes (Earth formed by collision of small bodies, Severely…
Astronomy Notes
Earth formed by collision of small bodies
Severely heated by impacts
Hot begining - 100 million year
Light Material coming to surface heavy into center
Molten earth
Liquid iron core
1 billion years rocks have been reheated of evidence
Rock Mantle crust
Supercontinent recently broke up
Metal in center creates magnetic field
We know our centris molten circulating metal because dynamo process
Dinamo process- costing magnetic field when liquid metal circlates
Waves of motion produced by earthquakes measured - speed of wave tells inside of erath
Produces hot spots
Show nature of earth's crust
Temp range for water is narrow earth is lucky
Venting interior of earth helped create atmosphere
Oceans filter radiation organism evolve using sunlight as energy
Greenhouse effect and oceans factor